|
Related Party Transactions (Details)
|
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2011
|
Dec. 31, 2010
|
Dec. 31, 2009
|
|
| Related Party Transactions [Abstract] | |||
| Number of Limited partner units owned by related party | 78,728 | ||
| Conversion of Limited partner ship units into common shares by related party | 0 | 22,431 | 183,024 |